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Science 2
Science Chapter 13
Question | Answer |
---|---|
A wave is a | distrubance that transfers energy from one place to another. |
Water that moves up and down traveling in a wave is known as a | disturbance which is transferring energy. |
Forces | can start disturbances that send waves through a materail. Examples: ropes, water and earthquakes. |
Mediums | substances which waves move through. |
Sound waves move through | air. |
Mechanical waves | move energy through matter |
Water, the ground, rope and air are all made up of | matter. |
Light is a wave that transfer energy | through empty space. |
Waves caused by an earthquake are good examples of | energy transfer |
Longitudinal waves travel | in the same direction as the disturbance. |
Transverse waves travel | perpendicular to the direction of the wave. |
Waves have | amplitude, wavelength and frequency. |
Crest | highest point of a wave |
Trough | lowest point of a wave |
amplitude | from the middle of the wave to the top or bottom of the wave |
wavelength | distance from one waves crest to the next waves crest |
frequency | the number of waves which pass a fixed point in a certain amount of time. |
As frequency decreases | wavelength increases. |
Speed= | wavelength times frequency |
Light waves travel 1,000,0000 times faster than | sound waves. |
Reflection | boucing back of waves |
Refraction | bending of wave as it enters a medium |
diffraction | spreading out of waves through an opening |
interference | meeting and combining of waves |
constructive interference is | the adding of 2 waves |
destruction interference is | the subtraction of energy. |